They will have a party( )[celebrate] it Please tell me if he knock( )the door 写理由
问题描述：
They will have a party( )[celebrate] it Please tell me if he knock( )the door 写理由
We can go for a walk( )it is fine tomorrow
答
to celebrate
不定式做目的状语
at
knock at the door 敲门 固定短语
if 如果 条件状语从句
不明白的再问哟,请及时采纳,多谢!